Attitude and position estimation from vector observations Conference Paper uri icon


  • This paper introduces three novel methods to evaluate attitude and position from vector observations using a vision-based technology camera. The first approach, called Linear Algebra Resection Approach (LARA), solves for attitude and position simultaneously and can be used in the lost-in-space case, when no approximate solution is available. The solution is shown to be the left eigenvector associated with the minimum singular value of a rectangular data matrix. The second and third approaches, called Attitude Free Approaches (AFA), recast the problem into a nonlinear system of equations in terms of the unknown position only. Two different methods are proposed to solve this nonlinear set of equations. The First AFA (FAFA) uses a least-square Newton-Raphson iterative procedure and is particularly suitable for the recursive case, while the Second AFA (SAFA) uses the toric resultant to eliminate two variables from the attitude-free system of nonlinear polynomial equations and a discretization of the Cauchy integral theorem to quickly isolate the solution. SAFA can be used either in the lost-in-space or in the recursive cases. Final numerical tests quantify the robustness of these methods in the case of measurements affected by noise.

published proceedings

  • Spaceflight Mechanics 2004, Vol 119, Pt 1-3

author list (cited authors)

  • Mortari, D., Rojas, J. M., & Junkins, J. L.

complete list of authors

  • Mortari, D||Rojas, JM||Junkins, JL

publication date

  • August 2005